[feat](trx-rs): add WFM RDS and playback controls

Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>

src/trx-core/src/lib.rs

@@ -13,5 +13,5 @@ pub type DynResult<T> = Result<T, Box<dyn std::error::Error + Send + Sync>>;
 pub use rig::command::RigCommand;
 pub use rig::request::RigRequest;
 pub use rig::response::{RigError, RigResult};
-pub use rig::state::{RigFilterState, RigMode, RigSnapshot, RigState};
+pub use rig::state::{RdsData, RigFilterState, RigMode, RigSnapshot, RigState};
 pub use rig::AudioSource;

src/trx-core/src/rig/command.rs

@@ -33,5 +33,6 @@ pub enum RigCommand {
     ResetWsprDecoder,
     SetBandwidth(u32),
     SetFirTaps(u32),
+    SetWfmDeemphasis(u32),
     GetSpectrum,
 }

src/trx-core/src/rig/controller/handlers.rs

@@ -516,6 +516,7 @@ pub fn command_from_rig_command(cmd: RigCommand) -> Box<dyn RigCommandHandler> {
         | RigCommand::ResetWsprDecoder
         | RigCommand::SetBandwidth(_)
         | RigCommand::SetFirTaps(_)
+        | RigCommand::SetWfmDeemphasis(_)
         | RigCommand::GetSpectrum => Box::new(GetSnapshotCommand),
     }
 }

src/trx-core/src/rig/mod.rs

@@ -155,6 +155,16 @@ pub trait RigCat: Rig + Send {
         )))
     }
 
+    fn set_wfm_deemphasis<'a>(
+        &'a mut self,
+        _deemphasis_us: u32,
+    ) -> Pin<Box<dyn Future<Output = DynResult<()>> + Send + 'a>> {
+        Box::pin(std::future::ready(Err(
+            Box::new(response::RigError::not_supported("set_wfm_deemphasis"))
+                as Box<dyn std::error::Error + Send + Sync>,
+        )))
+    }
+
     /// Return the current filter state if this backend supports filter controls.
     fn filter_state(&self) -> Option<state::RigFilterState> {
         None

src/trx-core/src/rig/state.rs

@@ -269,6 +269,12 @@ pub struct RigFilterState {
     pub bandwidth_hz: u32,
     pub fir_taps: u32,
     pub cw_center_hz: u32,
+    #[serde(default = "default_wfm_deemphasis_us")]
+    pub wfm_deemphasis_us: u32,
+}
+
+fn default_wfm_deemphasis_us() -> u32 {
+    75
 }
 
 /// Spectrum data from SDR backends (FFT magnitude over the full capture bandwidth).
@@ -280,6 +286,22 @@ pub struct SpectrumData {
     pub center_hz: u64,
     /// SDR capture sample rate in Hz; the displayed span is ±sample_rate/2.
     pub sample_rate: u32,
+    /// Decoded Radio Data System state, when available for WFM.
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub rds: Option<RdsData>,
+}
+
+/// Live RDS metadata decoded from a WFM broadcast.
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+pub struct RdsData {
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub pi: Option<u16>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub program_service: Option<String>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub pty: Option<u8>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub pty_name: Option<String>,
 }
 
 /// Read-only projection of state shared with clients.